Precast insulated concrete deck slab



G. E. NAGEL PRECAST INSULATED CONCRETE DECK SLAB July 7, 1936.

Filed DeC. 16, 1935 652017@ EJVaye n q a O man ORVDD OBMQAQQS OSW .vom

Patented July 7, 1936 Panelists v ,INsULA'rED CONCRETE DECK SLAB GeorgeE. Nagel, Columbus, Ohio ApplieationuDecernber 16, 1935, Serial No. 54,769

7 Claims;

This invention relatestoa .Iplrercastfinsulated concrete deck Aslab and has fo r its object to provide, in amanner.as hereinaftenset forth a Slab the class referred to so formed as `to overcome heatloss as Well asmtolpreyent ltheforming thereonand thedrippins therefrom,y nfcndensates,

The inyentionfurther clairnstohprovide, ina

manner as. hereinafter set fortha `pre-Cast' ,in-

sulated Concrete deck slabsouconstructed as to overcome the objections now present in the use precast non-insulated. deelnslabsi such @hietions, primarily. 4reSi ie inz thehigh .105s f. heat throusntne thin section f concrete, andiwnenf used on buildings, which .must JOS, heetst, 9011- densaticn. :forms 0n., the under side; of the slab surfacev causing water towdripvtherefrom.y n *A The invention, further. aims. tafpleyifiain :n

manner as hereinafter.Setformeel efcast.A con;

Crewneck slab is comraiativelfa Sinilein; its:v construction.. Str0ns. durabla, Cannet thoroughly efcient WhenU-usedrea 'ily installed sive to manufacture with respecttoth slabs of:

thel class 130. WlliQl'i `this inyentiqn bel With @the foregoing end. Oibe may hereinafiraprsnf the. ini/911@ Whih consists of the i novel tconstruction, coinloinatie;nA y andk f-a'rff rangement .0f parts. as" Wi 1 1, be..m01e Snei'flll'y referred `tomand` as; are illustrated infgthaceo'rn pani/ine ,drawins-twnereiners Shown Several-@His bodiments of `the invention, istolbe ri/rider! stood that changes, u Variations.` and @modifications the invention as plantada- Figure 1 is a Afragrnentary. Yviewin `transverse section. of a course'of slabs accordance'with this invention, Figure A 2 is Va jlongitudinalsectional vievv of generally A:indicated atY 'I. IThe slab includes 'an inreridl Channelfshaned Ceneri bdr 0r outerfsection having a metallic reinfercedftop ami fspaedparallel-like flanges agde-1 pendingV .fromqtop 3, a rabb et I0, in leach side f marginal, nqrtion inaiop and Merlet .Oli

spaced. metallic reinforced parallel rounded ribs Il of like form depending from the inner or lower'face of top 8. The ribs Il are of materially` less height than that of the flanges 9. The outer side face squared and flush with the side edges of top 8. The inner'side faces I3 of the flanges 9 extend from'their bottoms to their tops at an inclination towards the longitudinal median'of the top 8. .L The inner side face I3 of each flange 9 is 10 formed with a flared grooveY Irl which s open at eachend and extends from one end to the uother end of the ange.

The body lor outer section employed in the modified forml of slab I5 shown in Figure 4 isI 15 geerallyof the same construction as that shown in Figures 1; 2; 3, 5 and 6 With the exception that the anges i6y of body or outer section of slab I5' are not provided in their inner side faces with the grooves I9.

With reference to Figures l, 2, and 3 the slab includes .a thin .inner section I1 of concrete impregnated with irregular `shaped particles I8 of any suitable material possessing acoustic propf ertiesf. The particles I8 provide the faces of the 25 section Il rough or irregular. The upper and lower side marginal portions are oppositely beveled to form short tapered tongues I9 which snugly engage throughout the Walls of the grooves M .yvhereby the outer and inner sections of the slab lare connected together, The sections of theslab 'l are also `connected together by spaced metallicreinforcing rods 29 (only one of yWhich is shawn); extendingthrough the flanges 9 and section `|'I. The ends ofthe rods are flush with 35 the outer faces of the ".lianges.`

Withwrefere'nce to Figures 1 and .2` the section I 'I1 hasmounted thereupon'between its ends and Vtheufla'nges 9 a Qweb'29fl of any suitable material possessing an insulating characteristic and 40 Whiehfis Ashown by Way of example, as a sheet OfCorru'gated cardboard abutting the bottom of theribs I l. The `,web 29"?. in connection With the ribs I I, andthelovver face of the top of vthejouter seeti` m0fV slab 'l provide parallel dead air cham- 45 bers A2l. "The upper face of the top o fithe outer section ofslab l is provided with a Water proof surface 22, which isforrned of built up layers of asphaltgandA felt.

Thevvform shoWnin Figure 3 Will be the same 50 as that illustrated by Figures 1 and 2 With the eiz'ception that the web '29a in the inner section I1 is omitted and that the section Il ispositioned directlyuagainstrthe ribs II of the outer section of'vtheslab I.; VThe section I'I coactswith the ribs 55 I2 0f the flanges Sfis 5l I I and lower face of the top 5 of the outer section of the slab I to provide spaced parallel chambers 23 filled with loosely arranged porous particles 24 of suitable insulating material. Otherwise than that as stated, the form shown in Figure 3 will be the same as the one illustrated by Figures l and 2.

With reference to Figure 4 the slab I5 includes an inner section 25 formed of the same materials as that of the section I'I. The section 25 is not provided with the tongues I4 at its sides. The side edges 25 of section 25 are oppositely beveled and wedge against the inner faces of the flanges I 6 of the slab I5. Metallic reinforcing rods 2'I extend through the flanges I6 and section 25 for connecting the outer and inner sections of the slab l5 together. Otherwise than that as stated the form shown in Figure 4 will be the same as the form shown in Figure 3.

With reference to Figure 5 the inner section 28 of the slab 'I has its exposed face 29 ground flat for decorative purposes, and otherwise than that as stated the form shown in Figure 5 will be the same as the form illustrated by Figure 3.

The method of making the slab 'I is first to cast the outer section thereof with the openings in the flanges for the passage of the reinforcing rods and with the flanges formed with the grooves with which the openings communicate.

When the outer section of the slab 'I is cast to form the grooves and openings, it is also provided, at such time with the spaced transverse ribs on its lower face.

Relative to the method of making the slab I5, the body section of the latter is first cast in the same manner as the body section of slab l, but with this exception, that the inner faces of the flanges of the outer section of slab I5 are not formed with grooves, as are the flanges of the outer section of slab 'I.

After the outer section of the slab 'I has set, it is removed from the mold and positioned in a manner to have its flanges extended upwardly. After the outer section of the slab I5 has set, it is removed from the mold and positioned in a manner to have its flanges extended upwardly.

With reference to the form shown in Figures 1 and 2 after the outer section of the slab I has been positioned as aforesaid, the web 20a is mounted upon the ribs and against the inner faces of the flanges, and which provides, in connection with the ribs, the dead air spaces. The reinforcing rods 20, are then extended through the flanges 9, after which the inner section I'I is cast thus joining sections II and I into one reinforced unit.

With reference to the forms shown in Figures 3, 4 and 5, instead of positioning the web 20a against the ribs, the spaces between the latter are filled with loose insulating material of any suitable type preferably porous, after which the inner section is secured to the outer section of the slab.

With reference to Figure 4 the side edges of the inner section 25 have its side edges abut against the non-grooved inner faces of the flanges I6 and the sections of the slab I5 are connected together by the reinforcing rods.

30 is employed to seal and insulate the joints between the slabs of a course.

Although the slab is designed primarily for roofing or deck purposes, yet it is to be understood it is to be used in any connection for which it may be found applicable.

What I claim is:

1. In a pre-cast insulated concrete deck slab, a pre-cast inverted channel shaped outer section formed of a top, side flanges depending from the top and spaced parallel ribs depending from and disposed transversely of the inner face of the top between and at right angles to the flanges, said ribs being of less height than that of the flanges, and a pre-cast inner section arranged within the outer section below the ribs between and being secured to the 'inner faces of said flanges.

2. A pre-cast insulated concrete deck slab comprising a pre-cast inverted channel shaped outer section formed of a top, side flanges depending from the top and spaced parallel ribs depending from and disposed transversely of the inner face of the top, said ribs being arranged between and of less height than that of the flanges, and means Within said section, spaced above the bottoms of the flanges, secured to the inner faces of said flanges and coacting with the ribs to provide the slab with spaced chambers, and particles of insulating material loosely arranged in each of said chambers.

3. A pre-cast insulated concrete deck slab comprising a pre-cast inverted channel shaped outer section formed of a top, side flanges depending from the top and spaced parallel ribs depending from and disposed transversely of the inner face of the top, said ribs being of less height than that of, and arranged between and disposed at right angles to the flanges, and a precast inner section arranged within the outer section below the ribs and secured to the inner faces of said flanges, said inner section consisting of a body of concrete impregnated with particles possessing an acoustic characteristic.

4. A precast insulated concrete deck slab comprising a pre-cast inverted channel shaped outer section formed of a top, side flanges depending from the top and spaced parallel ribs depending from and disposed transversely of the inner face of the top, said ribs being of less height than that of the flanges, a fibrous web positioned against :1

the bottoms of and forming in connection with said ribs dead air chambers, and a pre-cast inner section arranged between and secured to the flanges of the outer section, said inner section abutting said web and confining it in position.

5. A pre-cast insulated concrete deck slab, comprising pre-cast inner and outer sections, said outer section being of inverted channel shape and formed on the inner face of its top with spaced ribs, said outer section including spaced parallel depending flanges merging at the upper portions of their inner faces into the ends of said ribs, said inner section being confined within said outer section between and above the bottoms of the flanges, and insulating means interposed between the said sections.

6. In a pre-cast insulated concrete deck slab, a pre-cast inverted channel shape outer section having parallel depending flanges and spaced ribs below the flanges, a pre-cast inner section of slab-like-form confined within the outer section below said ribs between the inner faces of said flanges, said inner section consisting of a body of concrete impregnated with particles possessing an acoustic characteristic, and spaced combined 75 coupling and reinforcing rods extending transversely through said inner section and having their end portions embedded in said flanges.

7. In a pre-cast insulated concrete deck slab, a pre-cast inverted channel shaped outer section formed of a top, side flanges depending from said top and spaced parallel ribs depending from the inner face of said top, .said anges being of greater height than that of the ribs, and means arranged completely within said outer section between the inner faces of and above the bottom of the flanges and below and coacting with said ribs and flanges to provide the slab with spaced chambers, said means being secured to the inner faces of said flanges,v and said ribs having their ends merging into the upper portion of the inner faces of said flanges.

GEORGE E. NAGEL. 

